Climate researchers have long grappled with how to get Americans to eat less beef, a food with a huge global warming impact. Now some are thinking about it through the lens of gender.

While many other developed countries are observing a similar phenomenon, experts say South Korea's fast social development and politicization of gender issues make its case particularly intense.

In her new book, writer — and mother of six — Gabrielle Blair makes the case that the abortion debate should focus much more on men's roles in unintended pregnancy.